Stripe\ApiRequestor::_formatAppInfo PHP Метод

    private static function _formatAppInfo($appInfo)
    {
        if ($appInfo !== null) {
            $string = $appInfo['name'];
            if ($appInfo['version'] !== null) {
                $string .= '/' . $appInfo['version'];
            }
            if ($appInfo['url'] !== null) {
                $string .= ' (' . $appInfo['url'] . ')';
            }
            return $string;
        } else {
            return null;
        }
    }